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Hard drive boot issues


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#1 SmokeViper07

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Posted 30 April 2014 - 05:12 PM

I have a 160 GB western digital black HDD with windows 7 ultimate installed on it and when the system boots it goes to a black screen saying

"error:unknown files system
 grub rescue>  "

 

It was working fine moments earlier. It doesn't have any other OS installed just Windows 7. Can you guys help?



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#2 TsVk!

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Posted 01 May 2014 - 02:45 AM

Microsoft forum fix here.



#3 Darktune

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Posted 01 May 2014 - 05:17 AM

Have you previously had any other OS installed on that HDD, specifically Linux based?

 

Thanks,

 

Darktune


It's very hard to imagine all the crazy things that things really are like. 

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#4 TsVk!

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Posted 01 May 2014 - 05:23 AM

Have you previously had any other OS installed on that HDD, specifically Linux based?

 

Thanks,

 

Darktune

I found that strange too... until I Googled it. Turns out to be a MBR issue. MS probably just 'borrowed' a bit of GRUB code.



#5 Darktune

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Posted 01 May 2014 - 05:29 AM

 

 

MS probably just 'borrowed' a bit of GRUB code.

 

That is strange  :crazy:


It's very hard to imagine all the crazy things that things really are like. 

Electrons act like waves.. no they don't exactly, they act like particles.. no they don't exactly.

Words and ideas can change the world.


#6 Anshad Edavana

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Posted 01 May 2014 - 06:17 AM

 

 

I found that strange too... until I Googled it. Turns out to be a MBR issue. MS probably just 'borrowed' a bit of GRUB code.

 

There are some Windows activation hacks which installs either GRUB or GRUB4DOS to the MBR. When the system is powered on, "GRUB" will load the activation hack first which will patch some BIOS strings to misidentify the system as an OEM one. Then the activator will chain loaded Windows which will activate itself without online validation ( basically the idea is to fool Windows in to thinking that the system came with a valid OEM licence ).

 

 I am not implying software piracy here but rather just pointing out the possibility.


Edited by Anshad Edavana, 01 May 2014 - 06:21 AM.


#7 SmokeViper07

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Posted 01 May 2014 - 12:06 PM

Have you previously had any other OS installed on that HDD, specifically Linux based?

 

Thanks,

 

Darktune

Yes I have in the past had Ubuntu installed on the drive but it should effect it now right? It's already been formatted to just windows. I tried the answer part of that link and it didn't help anything. I'm gonna try doing the full fix stated there by doing the startup repair. And no this isn't a software piracy case, I didn't even know about such things until you just mentioned it.



#8 dc3

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Posted 01 May 2014 - 12:53 PM

Instructions for a Windows 7 Repair installation.
 
A Windows 7 Repair Installation will require a installation disc.
 
If you do not have a Windows 7 installation disc you can download a free legal ISO image of Windows 7 SP1 at  Windows 7 Forums.  You will need to download the same version of Windows 7 that you have installed,  This image is hosted by the Digital River store which is an official distribution partner of Microsoft.  This is a genuine untouched image which is safe to download. 
 
Attention:  If you do have a Windows installation disc, skip Part A and go to Part B, Step 1b.
 
Part A, Steps 1a - 6a
 
How to burn ISO image using Windows Burn Disk Image.
 
Notice:  This applies only to Windows 7 and Windows 8, earlier versions do not have this.
 
1.  Place a blank CD or DVD in the tray of your optical drive and close the tray.
 
2.  After you have downloaded the ISO image you want to burn right click on the Start orb, then choose Windows Explorer.
 
3.  When Explorer opens click on Downloads in the left pane.  Scroll down till you find the ISO file you want and double click on it.  Click on Burn Disk Image.
 
4.  In the image below you will see Dick] burner:, this should be set to the optical drive you want to use.  Click on Verify disc after burning if you want to Windows to verity the disc image after burn.  Click on burn.
 
burndiskimage1_zpsb502b181.png
 
5.  In the image below you can see that the green progress bar, when the image is finished burning the bar will be filled.
 
burndiskimage2_zps17a9d6ff.png
 
6.  After the image has completed being burned click on Close
 
Please note:  In order to boot from this DVD you may need to change the boot order in the BIOS so that the CD/DVD-ROM is the first device in the boot order, and the hdd is the second device.
 
 
Part B, Steps 1b - 10b
 
1b)  Place the installation disc in the tray of the CD/DVD drive, close the tray and restart the computer.
 
2b)  You will be prompted to press any key to start the installation, I find the space bar handy.
 
At this point the setup process will load files, this will take several minutes.
 
3b)  You will now need to choose the  Language, Time, currency format, and Keyboard or input method that you'd like to use.
 
After this is done click on Next.
 
w71_zps6dbda47e.png
 
4b)  Click on the Repair your computer link at the bottom-left of the Install Windows window.
 
This link will begin the Windows 7 System Recovery Options.
 
w72_zps2a656a0c.png
 
5b)  System Recovery Options will now search your hard drive(s) for any Windows 7 installations.  This will take several minutes.
 
No participation is required on your part at this time, wait till it has finished and the next window opens.
 
w73_zpsd5483f05.png
 
6b)  Choose the Windows 7 installation that you'd like to perform the Startup Repair on, then click on Next
 
w74_zps490f9a17.png
 
7b)  Click on the Startup Repair link from list of recovery tools in System Recovery Options.
 
w75_zps9941e858.png
 
For a future reference, there are several other diagnostic and recovery tools available in the Windows 7 System Recovery Options including System Restore, System Image Recovery, Windows Memory Diagnostic, and Command Prompt.
 
8b)  The Startup Repair tool will now search for problems in the system files.
 
If Startup Repair finds a problem with any system files the tool may suggest a solution which you will need to confirm, or may solve the problem automatically.
 
w76_zps3dd75d83.png
 
9b)  Startup Repair will now attempt to repair whatever problems it found with system files.  
 
Note:  If Startup Repair did not find any problems with system files you won't see this step.
 
w77_zpsd8be95eb.png
 
Important: Your computer may or may not restart several times during this repair process.  This is normal, you should allow it to continue until you see the Restart your computer to complete the repairs window. 
 
10b)  Click on Finish, this will restart your computer.
 
w78_zpsd49257fb.png
 
It is possible that the Startup Repair will not be able to fix the problem.  If the Startup Repair tool determines this, it may automatically run the the repair after your computer restarts.  If it does not automatically run the repair but you are still having problems with Windows 7 repeat these steps to run Startup Repair again manually.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.

 

 

 

 


#9 SmokeViper07

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Posted 01 May 2014 - 11:52 PM

I attempted to go through this process and got an error when it was trying to find the Windows installation. Is there a way to fix this or should I just attempt to save as much data possible via a live cd and reinstall completely?
 


Edited by hamluis, 02 May 2014 - 12:20 PM.
Removed unnecessary quote box - Hamluis.


#10 TsVk!

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Posted 02 May 2014 - 12:42 AM

look at my first post after your initial question... follow the answer.



#11 TsVk!

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Posted 02 May 2014 - 03:55 AM

to re-iterate... you did this?

 

from the menu (in the windisk repair screen)  select the ‘Command Prompt’ option.

at the DOS prompt type the following three commands:

bootrec.exe  /fixmbr

bootrec.exe  /fixboot (may return an 'Element not found' message)

bootrec.exe  /RebuildBcd

 

how does your machine respond? what messages do you get?



#12 SmokeViper07

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Posted 02 May 2014 - 02:10 PM

It states the commands completed successfully but it didn't fix anything as far as the boot issue gies

#13 Darktune

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Posted 02 May 2014 - 02:36 PM

Just a thought, if you previously had Linux was it on dual boot?

 

If you uninstalled it incorrectly that can sometimes corrupt the hard drive and the Windows installation on the HD

 

Thanks,

 

Darktune


It's very hard to imagine all the crazy things that things really are like. 

Electrons act like waves.. no they don't exactly, they act like particles.. no they don't exactly.

Words and ideas can change the world.


#14 dc3

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Posted 02 May 2014 - 03:14 PM

Try the following.  If it doesn't complete successfully the rebuild will require further steps.

 

Click on the Start orb and type cmd in the Search programs and files box.
 
cmd will appear above the Search box under Programs, right click on it and choose Run as administrator.
 
When the Elevated Command Prompt open type in bootrec /rebuildbcd and press Enter.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.

 

 

 

 


#15 TsVk!

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Posted 02 May 2014 - 07:28 PM

It states the commands completed successfully but it didn't fix anything as far as the boot issue gies

Well, that's got me in a dilly... I would seriously consider updating your backup image manually, with a live disk like you suggested.






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